Method and device for performing interference control

• US 9,775,056 B2
• Filed: 03/05/2013
• Issued: 09/26/2017
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Pan, Xueming, Shen, Zukang, Xu, Jing
• Primary Examiner(s): Hsieh, Ping
• Assistant Examiner(s): Yang, James
• Application Number:
  US14/397,198
• Publication Number:
  US 20150045076A1
• Time in Patent Office: 1,666 Days
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method and device for performing interference control are provided. The method includes: network side device determines traffic load parameter value of each cell and the measurement parameter between the base stations which random two cells belongs to; For the two cells, the network side device determines an interference control threshold according to the traffic load parameter value of the two cells, and compares the determined the measurement parameter with the interference control threshold, and performs cluster partition according to the comparing result. The network side device performs interference control according to the partitioned cluster. Because the factor of cell traffic load is considered in performing TDD cross link interference control, thus the cross link interference in TDD networking is reduced.

Claims

1. A method for performing interference control, comprising:

determining, by a network side device, a traffic load parameter value of each cell and a measurement parameter value between base stations which serve for any two cells, the measurement parameter value between the base stations is one or more of the following parameter values;

a path loss value, a coupling loss value or an interference power value;

for the two cells, determining, by the network side device, an interference control threshold value according to the traffic load parameter values of the two cells, comparing the measurement parameter value determined with the interference control threshold value and dividing the two cells into clusters according to the comparison result; and

performing, by the network side device, interference control according to clusters after dividing;

wherein the performing, by the network side device, interference control according to the clusters after dividing comprises;

the network side device using the same uplink and downlink configuration for the cells in the same cluster, wherein the uplink and downlink configuration is an allocation pattern of uplink and downlink sub-frames in a radio frame; and

the network side device using same or different uplink and downlink configurations for the cells in the different clusters.

2. The method according to claim 1, wherein determining, by the network side device, the interference control threshold value comprises:

determining, by the network side device, a load grade according to the traffic load parameter values of the two cells; and

searching for, by the network side device, an interference control threshold value corresponding to the load grade determined according to a corresponding relation between the load grade and the interference control threshold value and taking the interference control threshold value searched out as the interference control threshold value.

3. The method according to claim 1, wherein after the network side device divides the two cells into clusters and before the network side device performs interference control, the method further comprises:

performing, by the network side device, merging on the clusters after dividing;

wherein any two clusters after merging do not contain a same cell.

4. The method according to claim 1, wherein if a centralized interference control mode is adopted, the network side device is a central node;

and

if a distributed interference control mode is adopted, the network side device is a base station.

5. The method according to claim 4, wherein the network side device is the central node;

and

determining, by the network side device, the traffic load parameter value of each cell and the measurement parameter value between the base stations which serve for any two cells comprises;

for one base station, the network side device receives the traffic load parameter value of each cell managed by the base station, which is determined by the base station, and the measurement parameter value between the base station and another base station, which is determined by the base station.

6. The method according to claim 4, wherein the network side device is the base station;

determining, by the network side device, the traffic load parameter value of each cell and the measurement parameter value between the base stations which serve for any two cells comprises;

determining, by the network side device, the traffic load parameter value of each cell managed by the network side device and the measurement parameter value between the network side device and another network side device, and receiving the traffic load parameter value of each cell managed by another base station, which is determined by the another base station, and the measurement parameter value between the base stations, which is determined by the another base station.

7. The method according to claim 1, wherein the traffic load parameter value of each cell comprises one or more of the following parameter values:

frequency resource occupancy rate, time resource occupancy rate, resource occupancy rate in a specific resource set or statistics of occupancy rates of different traffic types of resources.

8. The method according to claim 1, wherein when the measurement parameter value between the base stations is the path loss value or the coupling loss value;

then

the dividing, by the network side device, the two cells into clusters comprises;

when the measurement parameter value between the base stations which serve for the two cells is smaller than the interference control threshold value determined, dividing, by the network side device, the two cells into a same cluster; and

when the measurement parameter value between the base stations which serve for the two cells is no smaller than the interference control threshold value determined, dividing, by the network side device, the two cells into different clusters.

9. The method according to claim 1, wherein when the measurement parameter value between the base stations is the interference power value, then

the dividing, by the network side device, the two cells into clusters comprises:

dividing, by the network side device, the two cells into a same cluster if the measurement parameter value between the base stations which serve for the two cells is larger than the interference control threshold value determined; and

dividing, by the network side device, the two cells into different clusters if the measurement parameter value between the base stations which serve for the two cells is no larger than the interference control threshold value determined.

10. A network side device for performing interference control, comprising:

a determination module configured to determine a traffic load parameter value of each cell and a measurement parameter value between base stations which serve for any two cells, the measurement parameter value between the base stations is one or more of the following parameter values;

a path loss value, a coupling loss value or an interference power value;

a division module configured to, for the two cells, determine an interference control threshold value according to the traffic load parameter values of the two cells, compare the measurement parameter value determined with the interference control threshold value and divide the two cells into clusters according to the comparison result; and

a control module configured to perform interference control according to clusters after dividing;

wherein the control module is configured to;

use the same uplink and downlink configuration for the cells in the same cluster; and

use same or different uplink and downlink configurations for the cells in the different clusters, and wherein the uplink and downlink configuration is an allocation pattern of uplink and downlink sub-frames in a radio frame.

11. The network side device according to claim 10, wherein the division module is specifically configured to:

determine a load grade according to the traffic load parameter values of the two cells; and

search for an interference control threshold value corresponding to the load grade determined according to a corresponding relation between the load grade and the interference control threshold value and take the interference control threshold value searched out as the interference control threshold value.

12. The network side device according to claim 10, wherein the division module is further configured to:

perform merging on the clusters after dividing,

wherein any two clusters after merging do not contain a same cell.

13. The network side device according to claim 10, wherein if a centralized interference control mode is adopted, the network side device is a central node;

and

if a distributed interference control mode is adopted, the network side device is a base station;

when the network side device is the central node;

then the determination module is specifically configured to;

for one base station, receive the traffic load parameter value of each cell managed by the base station, which is determined by the base station, and the measurement parameter value between the base station and another base station, which is determined by the base station;

when the network side device is the base station;

then the determination module is specifically configured to;

determine the traffic load parameter value of each cell managed by the network side device and the measurement parameter value between the network side device and another network side device, and receive the traffic load parameter value of each cell managed by another base station, which is determined by the another base station, and the measurement parameter value between the base stations, which is determined by the another base station.

14. The network side device according claim 10, wherein the traffic load parameter value of each cell comprises one or more of the following parameter values:

frequency resource occupancy rate, time resource occupancy rate, resource occupancy rate in a specific resource set or statistics of occupancy rates of different traffic types of resources.

15. The network side device according to claim 10, wherein when the measurement parameter value between the base stations is the path loss value or the coupling loss value;

and the division module is specifically configured to;

when the measurement parameter value between the base stations which serve for the two cells is smaller than the interference control threshold value determined, divide the two cells into a same cluster; and

when the measurement parameter value between the base stations which serve for the two cells is no smaller than the interference control threshold value determined, divide the two cells into different clusters.

16. The network side device according to claim 10, wherein when the measurement parameter value between the base stations is the interference power value;

and the division module is specifically configured to;

when the measurement parameter value between the base stations which serve for the two cells is larger than the interference control threshold value determined, divide the two cells into a same cluster; and

when the measurement parameter value between the base stations which serve for the two cells is no larger than the interference control threshold value determined, divide the two cells into different clusters.